public class Main {
    public static void main(String[] args) {
        Student student1 = new Student("dick", 20);
        System.out.println("Student1：");
        student1.displayInfo();

        Student student2 = new Student("small dick", 21, "清华大学");
        System.out.println("Student2：");
        student2.displayInfo();

        Student student3 = new Student("big dick", 22, "北京大学", "计算机科学");
        System.out.println("Student3：");
        student3.displayInfo();
    }
}